79431378 has 64 divisors (see below), whose sum is σ = 186157440. Its totient is φ = 22367232.

The previous prime is 79431371. The next prime is 79431389. The reversal of 79431378 is 87313497.

It is not an unprimeable number, because it can be changed into a prime (79431371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48253 + ... + 49871.

It is an arithmetic number, because the mean of its divisors is an integer number (2908710).

Almost surely, 2^79431378 is an apocalyptic number.

79431378 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 79431378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93078720).

79431378 is an abundant number, since it is smaller than the sum of its proper divisors (106726062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79431378 is a wasteful number, since it uses less digits than its factorization.

79431378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691.

The product of its digits is 127008, while the sum is 42.

The square root of 79431378 is about 8912.4282886316. The cubic root of 79431378 is about 429.8636272070.

The spelling of 79431378 in words is "seventy-nine million, four hundred thirty-one thousand, three hundred seventy-eight".